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Cannondale Jekyll Owner's Manual
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Cannondale Jekyll Owner's Manual

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CANNONDALE
JEKYLL
OWNER'S MANUAL
®
TM
Congratulations and thanks for purchasing the world's newest, most
innovative, and most adjustable full suspension design, the Cannondale
Jekyll. Please take a moment to read and understand this supplement
and the other literature included with the bike, including the Cannondale
Bicycle Owner's Manual and the HeadShok specific supplement. These
will provide important safety warnings and performance tips which will
make for many miles of safe, high output riding pleasure. If you have any
questions about your frame or the contents of this manual, don't hesitate
to contact us. See the back page for phone numbers and E-mail contacts.
Your Cannondale Jekyll should have also included a standard owner's
manual and a front suspension specific manual. If you did not receive
both the Cannondale Bicycle Owner's Manual and the HeadShok owner's
manual, please download and print one from the Cannondale website
Tech Center or call our customer service line at 1-800-BIKE-USA in
the U.S. or Canada to have one sent to you.
Please note that this manual is meant to supplement, not to replace, the
Cannondale Bicycle Owner's Manual. The owner's manual contains valu-
able information regarding safe operation, adjustment, and maintenance
of your bicycle, as well as more complete warranty information. Please
read the Cannondale Bicycle Owner's Manual thoroughly before riding
your bicycle, and keep it and this booklet for future reference.
Because the Jekyll bicycles are so unique, there are some important facts
and warnings of which you need to be aware. The warnings are written as
appropriate throughout this manual. Please read and heed all warnings,
the information is here for your benefit.

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Summary of Contents for Cannondale Jekyll

  • Page 1 Cannondale Bicycle Owner’s Manual thoroughly before riding your bicycle, and keep it and this booklet for future reference. Because the Jekyll bicycles are so unique, there are some important facts and warnings of which you need to be aware. The warnings are written as appropriate throughout this manual.
  • Page 2 The rear wheel travel on the Jekyll is a full 120mm, regardless of where the shock is positioned in the collar. Some Jekyll models use Fox rear shocks equipped with compression adjusters which can be used to stiffen the rear suspension for a more race-oriented ride.

  • Page 3: Front Derailleur

    Lefty fork. Using any fork other than those listed here could lead to frame or fork failure, and will void your warranty. WARNING: Jekyll frames were not designed to use forks other than those manufactured, tested, and approved by Cannondale. If you do so you may break, damage, or shorten the life of the Cannondale frame, with result- ing risk of injury or death to the rider.
  • Page 4 SWINGARM PROTECTOR The swingarm on your Jekyll is made of thin wall aluminum tubing and some CNC-machined aluminum parts. To protect the CAAD 4 swingarm (found on some Jekyll models) from damage inflicted by the chain slap- ping against the chainstay, we have supplied a self-adhesive vinyl pro- tector for the swingarm.
  • Page 5 JEKYLL GEOMETRY ADJUSTMENT The adjustable geometry of the Jekyll frame allows for a maximum head tube angle of 71 degrees with a corresponding bottom bracket height of 13.5 inches (34.3cm) with the shock threaded fully aft in the pivoting collar. At the other end of the range of adjustment, the minimum head tube angle is 69.5 degrees with a corresponding bottom bracket height...
  • Page 6 SEE THE FOLLOWING PARAGRAPH ABOUT FRONT DERAILLEUR ADJUSTMENT. FRONT DERAILLEUR ADJUSTMENT—VERY IMPORTANT! The Jekyll’s rear suspension design places the front derailleur on the rear swingarm. This arrangement requires very precise adjustment of the front derailleur. Additionally, the adjustability of the Jekyll’s geometry means that the front derailleur adjustment must be checked whenever changing the rear shock position.
  • Page 7 Fig.1 Note Threads Fig.2...
  • Page 8 SHIFTING PRECAUTIONS / CHAIN LENGTH The chain on a Jekyll must be kept long enough to prevent damage to the rear derailleur when the rear shock is at its most forward position and the rear suspension compresses to its full travel with the chain on the large chainring and one of the larger rear cogs.

  • Page 9: Front Brake

    CAAD4 SWINGARM EQUIPPED JEKYLL FRONT BRAKE Run hydraulic line directly from the front brake lever to the front brake. If equipped with a Lefty, the hydraulic tubing should not go through the clamps, but rather to the outside of the Lefty leg and behind to the disc brake.

  • Page 10: Rear Brake

    REAR BRAKE Run the hydraulic tubing from the rear brake lever to the lower slots in the double housing stops on the left side of the down tube. Secure the hydraulic line in the aluminum guides with the supplied plastic guide clips.

  • Page 11: Rear Derailleur

    Run bare cable to the rearward housing stop on the swingarm. Run cable housing from the rear housing stop on the swingarm to the rear derailleur. ELEVATED (BONDED) SWINGARM EQUIPPED JEKYLL FRONT BRAKE For front disc brakes: Run hydraulic line directly from the front brake lever to the front brake.
  • Page 12 Rear Brake Rear Derailleur Fig.7 FRONT DERAILLEUR Run cable housing from the front shifter to the housing stop on the right side of the downtube. Run exposed cable to the housing stop a the lower end of the downtube. Run cable housing (approx. 32cm.) from this down- tube stop, under the bottom bracket, and to the housing stop on the swingarm just behind the rear suspension pivot.
  • Page 13 JEKYLL SEATPOST MOUNTING The Jekyll will accept any 27.2mm diameter seatpost. The seatpost must be inserted with at least the recommended minimum insertion into the seatube. Grease the seatpost clamp bolt threads and tighten it to 70-80 In-Lbs (8-9 Nm.)
  • Page 14 1. With the rider off of the bike, attach a high pressure precision air pump with gauge to the threads and add air pressure equal to the rider’s weight (in p.s.i.). If you turned the shock to more easily access the Schrader valve, rotate the shock back to a position where you can easily reach the blue shock compression adjuster and retighten the shock lock ring.
  • Page 15 DO NOT RIDE a bike with any crack, even a small one. See your authorized Cannondale retailer or call 1-800-BIKE-USA. A crack will weaken the frame and could lead to failure, with risk of serious injury or death to...
  • Page 16 Under this warranty we will repair any defective frame, or at our discretion, we will replace a defective frame with the same or comparable model (due to product evolution). See the standard Cannondale Owner’s Manual for more details. All other components, including HeadShok forks, suspension parts,...